Concrete construction for ceilings for buildings.



T. J. FRABER. CONCRETE CONSTRUCTION FOR CEILINGS FOR BUILDINGS.

APPLICATION FILED AUG-9.1917- Patented Jan. 15, 1918.

CONCRETE CONSTRUCTION FOR CEILINGS FOR BUILDINGS.

Application filed August 9, 1917.

To all whom it may concern:

Be it known that I, THOMAS J. F RABER, a citizen of the United States, residing at Vashington, in the District of Columbia, have invented certain new and useful Improvements in Concrete Construction for Ceilings for Buildings; and do hereby declare tho/following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in reinforcing concrete construction for ceilings of rooms, in which the forms for the bottoms of the concrete work are supported by reinforcing bars, through the medium of eyebolts which are afterward employed as anchorage means to which the ceiling plates or sheets are fastened.

The present invention comprises a simple and efficient device of this nature having various details of construction, combinations and arrangements of parts, which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claim.

My invention is illustrated in the accompanying drawings which, with the letters of reference marked thereon, form a part of this specification and in which:

Figure 1 is an end elevation, showing the two-part pan or mold form supported by I-beams and reinforcing bars, and

Fig. 2 is a top plan view of the construction shown in Fig. 1.

Reference now being had to the details of the drawings by numeral:

1 designates I-beams, and 2 designates forms or pans which, in the present instance are shown as on the arcs of circles with their outer ends beveled and supported upon the flanges of the I-beams, While the adjacent ends have shouldered portions 3 adapted to overlap each other. The over-lapping portions are provided with registering aper- Specification of Letters Patent.

Patented J an. 15, 1918.

Serial No. 185,314.

tures to receive the shank portion l of a hook or eyebolt 5, and G is a nut fitted upon the lower threaded end of the bolt. Reinforcing bars 7 are supported between the I-beams and longitudinally disposed reinforcing rods 8 rest upon said bars 7 in parallel relation and are held in place upon the bars by tie wires 9. The said eyebolts or hooks 5 are supported upon the central one of the several rods 8, as shown in Fig. 1 of the drawings, and provide means for supporting the forms or pans 2 while the plastic material is being filled in between the I-beams.

After the concrete has been filled in about the reinforcing rods and has become set, the nuts 6 may be removed from the threaded ends of the bolts and permit the two-part mold forms or pans to be removed, while the threaded end of the bolt projects below the under surface of the concrete and which may be utilized as an anchorage means to secure any form of ceiling to the undersurface of the molded concrete intermediate the I-beams.

By the provision of the mechanism'shown and described it will be noted that the forms for the arched or vaulted ceiling in the concrete construction is supported by means attached to the reinforcing members and without the necessity of building up supports from beneath, which is commonly the practice in constructions of this nature at the present time, the entire weight of the forms being supported by the I-beams. After the concrete has been filled in above the forms and set, the forms may be withdrawn from the bottom of the ceiling, leaving the anchorage bolts projecting downwardly and under which arrangement, other forms of ceiling sheets or plates may be attached.

lVhat I claim to be new is:

A form for use in concrete ceiling construction comprising two curved members, the outer edges of which are adapted to be supported upon flanges of I-beams, the adj acent ends of the members having shoulders which overlap each other, and provided with registering apertures, a hook adapted to be anchored in the concrete construction In testimony whereof I hereunto afiix my and passlng through said registering aper signature in presence of two witnesses.

tures, and a nut upon the threaded portion THOMAS J. FRABER. of the hook, adapted to hold the form in Witnesses:

-5 place and support the overlapping edges A. L. HOUGH,

thereof. FRANKLIN H. HoUeH.

Copies of this patent may be obtained for five cents each by addressing the Commissioner of l atents,

Washington, D. C. V V 

